The TAP03 2-site exchange R1ρ model

The TAP03 2-site exchange R_1ρ model

This is the model for 2-site exchange for off-resonance R_1ρ-type data from Trott et al. (2003). It is selected by setting the model to `TAP03'. The equation for the exchange process is

R_1ρ =	R₁cos²θ + R_1ρ'sin²θ
	+ $\displaystyle \left(\vphantom{ \frac{1}{\gamma} }\right.$ $\displaystyle {\frac{{1}}{{\gamma}}}$ $\displaystyle \left.\vphantom{ \frac{1}{\gamma} }\right)$ $\displaystyle {\frac{{\sin^2\hat\theta p_{\textrm{A}}p_{\textrm{B}}\Delta\omega... ...\theta p_{\textrm{A}}p_{\textrm{B}}\Delta\omega ^2 + (1 - \gamma)\omega_1 ^2}}}$ ,	(11.78)

in which, in addition to those parameters defined above for the `TP02' model,

$\begin{subequations}\begin{align} \sigma &= p_{\textrm{B}}\delta_A + p_{\textrm{... ...sqrt{\gamma}\omega_1 }{\overline{\Omega}} \right). \end{align}\end{subequations}$

The equation is accurate when populations are less skewed than the `TP02' model ( p_A $\gg$ p_B). Note that this model, as with the `TP02' model, has been superseded by the `MP05' model in the next section. The reference for this equation is:

Trott et al. (2003)

More information about the TAP03 model is available from:

the relax wiki at http://wiki.nmr-relax.com/TAP03,
the API documentation at http://www.nmr-relax.com/api/3.2/lib.dispersion.tap03-module.html,
the relaxation dispersion page of the relax website at http://www.nmr-relax.com/analyses/relaxation_dispersion.html#TAP03.

The relax user manual (PDF), created 2024-06-08.